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Nitrification plays an important role in nitrogen turnover in composting process. It has been believed that nitrification occurs mainly during the maturation phase due to the elevated temperature during the active phase of composting. In this work, the intense biodegradation of organic matters is demonstrated to be another negative impact on the ammonia oxidation, the first step of nitrification....
This study investigated the effects of adding Cu(II) at two exposure levels (50 and 500mgkg−1, i.e., Cu50 and Cu500 treatments, respectively) on the activity of ammonia-oxidizing microorganisms during dairy cattle manure composting. The results showed that the pH, NH4+-N, NO3−-N, and potential ammonia oxidation values were inhibited significantly by the addition of Cu(II). Furthermore, the abundances...
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